On the night before my high school entrance ceremony, my little sister came into my room and suddenly confessed.

“Onii-chan…… go out with me!!”

My very first confession in life… and it’s from my little sister!?

I couldn’t bring myself to reject her after seeing her cry, so I left my answer pending and continued with the entrance ceremony with that status quo.

We’re even going to the same high school.
What am I supposed to do by dating my little sisterーーー!?

An affectionate romcom full of lovey-dovey moments between an imouto with god-tier communication skills and extreme brocon tendencies, and a kind, ordinary onii-chan who’s a total loner. What happens when he actually tries dating his little sister!?

And then, one after another, various girls who harbor feelings for the protagonist start appearing… and on top of that, a new elementary-school-aged little sister is born!?

Author's Note: Please be warned: if you hate little sisters, you won’t enjoy this. Sorry, but if you’re not into imouto characters, please refrain from reading this novel. (lol)

“This is the kind of little sister I always wanted.”
“I wish my little sister were like this.”
“If she were this kind of imouto, maybe I could love her……”